[PATCH 3/5 RESEND] x86/lib: checksum_64.h: eliminate all kernel-doc warnings

[Randy Dunlap <rdunlap@infradead.org>]

- correct missing function parameter names
- add missing function return value sections
- use the correct function name in comments

to avoid these warnings (samples):
Warning: arch/x86/include/asm/checksum_64.h:23 No description found for
 return value of 'csum_fold'
Warning: arch/x86/include/asm/checksum_64.h:46 function parameter 'iph'
 not described in 'ip_fast_csum'
Warning: arch/x86/include/asm/checksum_64.h:46 function parameter 'ihl'
 not described in 'ip_fast_csum'
Warning: arch/x86/include/asm/checksum_64.h:46 No description found for
 return value of 'ip_fast_csum'
Warning: arch/x86/include/asm/checksum_64.h:89 expecting prototype for
 csum_tcpup_nofold(). Prototype was for csum_tcpudp_nofold() instead
Warning: arch/x86/include/asm/checksum_64.h:115 expecting prototype for
 csum_tcpup_magic(). Prototype was for csum_tcpudp_magic() instead
Warning: arch/x86/include/asm/checksum_64.h:119 No description found for
 return value of 'csum_tcpudp_magic'
Warning: arch/x86/include/asm/checksum_64.h:129 No description found for
 return value of 'csum_partial'
Warning: ./arch/x86/include/asm/checksum_64.h:175 function parameter
 '_saddr' not described in 'csum_ipv6_magic'
Warning: ./arch/x86/include/asm/checksum_64.h:175 function parameter
 '_daddr' not described in 'csum_ipv6_magic'
Warning: ./arch/x86/include/asm/checksum_64.h:175 Excess function
 parameter 'saddr' description in 'csum_ipv6_magic'
Warning: ./arch/x86/include/asm/checksum_64.h:175 Excess function
 parameter 'daddr' description in 'csum_ipv6_magic'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
---
Cc: Thomas Gleixner <tglx@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org

 arch/x86/include/asm/checksum_64.h |   29 +++++++++++++++------------
 1 file changed, 17 insertions(+), 12 deletions(-)

--- linux-next-20260717.orig/arch/x86/include/asm/checksum_64.h
+++ linux-next-20260717/arch/x86/include/asm/checksum_64.h
@@ -14,11 +14,13 @@
 
 /**
  * csum_fold - Fold and invert a 32bit checksum.
- * sum: 32bit unfolded sum
+ * @sum: 32bit unfolded sum
  *
  * Fold a 32bit running checksum to 16bit and invert it. This is usually
  * the last step before putting a checksum into a packet.
  * Make sure not to mix with 64bit checksums.
+ *
+ * Returns: new checksum value
  */
 static inline __sum16 csum_fold(__wsum sum)
 {
@@ -40,8 +42,10 @@ static inline __sum16 csum_fold(__wsum s
 
 /**
  * ip_fast_csum - Compute the IPv4 header checksum efficiently.
- * iph: ipv4 header
- * ihl: length of header / 4
+ * @iph: ipv4 header
+ * @ihl: length of header / 4
+ *
+ * Returns: header checksum
  */
 static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
 {
@@ -74,14 +78,14 @@ static inline __sum16 ip_fast_csum(const
 }
 
 /**
- * csum_tcpup_nofold - Compute an IPv4 pseudo header checksum.
+ * csum_tcpudp_nofold - Compute an IPv4 pseudo header checksum.
  * @saddr: source address
  * @daddr: destination address
  * @len: length of packet
  * @proto: ip protocol of packet
  * @sum: initial sum to be added in (32bit unfolded)
  *
- * Returns the pseudo header checksum the input data. Result is
+ * Returns: the pseudo header checksum the input data. Result is
  * 32bit unfolded.
  */
 static inline __wsum
@@ -100,14 +104,14 @@ csum_tcpudp_nofold(__be32 saddr, __be32
 
 
 /**
- * csum_tcpup_magic - Compute an IPv4 pseudo header checksum.
+ * csum_tcpudp_magic - Compute an IPv4 pseudo header checksum.
  * @saddr: source address
  * @daddr: destination address
  * @len: length of packet
  * @proto: ip protocol of packet
  * @sum: initial sum to be added in (32bit unfolded)
  *
- * Returns the 16bit pseudo header checksum the input data already
+ * Returns: the 16bit pseudo header checksum the input data already
  * complemented and ready to be filled in.
  */
 static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
@@ -123,7 +127,7 @@ static inline __sum16 csum_tcpudp_magic(
  * @len: length of buffer.
  * @sum: initial sum to be added in (32bit unfolded)
  *
- * Returns the 32bit unfolded internet checksum of the buffer.
+ * Returns: the 32bit unfolded internet checksum of the buffer.
  * Before filling it in it needs to be csum_fold()'ed.
  * buff should be aligned to a 64bit boundary if possible.
  */
@@ -141,7 +145,7 @@ extern __wsum csum_partial_copy_nocheck(
  * @buff: buffer address.
  * @len: length of buffer.
  *
- * Returns the 16bit folded/inverted checksum of the passed buffer.
+ * Returns: the 16bit folded/inverted checksum of the passed buffer.
  * Ready to fill in.
  */
 extern __sum16 ip_compute_csum(const void *buff, int len);
@@ -159,15 +163,16 @@ static inline unsigned add32_with_carry(
 
 /**
  * csum_ipv6_magic - Compute checksum of an IPv6 pseudo header.
- * @saddr: source address
- * @daddr: destination address
+ * @_saddr: source address
+ * @_daddr: destination address
  * @len: length of packet
  * @proto: protocol of packet
  * @sum: initial sum (32bit unfolded) to be added in
  *
  * Computes an IPv6 pseudo header checksum. This sum is added the checksum
  * into UDP/TCP packets and contains some link layer information.
- * Returns the unfolded 32bit checksum.
+ *
+ * Returns: the unfolded 32bit checksum.
  */
 
 static inline __sum16 csum_ipv6_magic(